搜索 - 科创网

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内容：我一直认为多级水火箭意义不大，毕竟靠的是水的反冲，一级发射有很大一部分能量用在加速二级（以上）水火箭里面的水上。,m2水，假设水的质量是箭体5倍=5m（箭体为m），水以恒定速度喷出，速度v水=5m/s一级发射：设此时火箭主体加速到v1，则有：m水*v水=（m1+m2+m2水）*v1，解得v1=5/7=0.7143二级发射,：设此时火箭一级箭体与二级箭体脱离，同时二级发射，二级箭体加速到v2，对二级箭体，有：v1（m2+m2水）=m2v2+m2水（v1-v水），解得v2=180/7=25.7143如果单级发射的话：m1v1,‘=m水v水，解得v1’=25可见二级水火箭将最终速度提高了v1=0.7143m/s在二级发射之前，水火箭速度非常低，0.7143m/s，此时水火箭姿态容易偏离原定轨道。

内容：2.一二级分离是冷分离还是热分离，看着像后者，但没有看到任何防热措施，直接对着降落伞，这样不会烧蚀降落伞吗?

内容：一级上面用热缩管连个塑料管插到二级尾部里面有个小分离药包。。。,几次试验的结果都是药包和二级同时点燃，直接就窜了二级气动外形不理想，稳定性不好分离后有时偏得厉害，不过挺好看。。。

约找到 1273 条结果，耗时 0.239 秒

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